﻿using System;
using System.Text;
using System.IO;

namespace SharpCompress.Test.Xz
{
    public abstract class XZTestsBase : IDisposable
    {
        public XZTestsBase()
        {
            RewindEmpty(CompressedEmptyStream);
            Rewind(CompressedStream);
            RewindIndexed(CompressedIndexedStream);
        }

        public void Dispose()
        {
            CompressedEmptyStream?.Dispose();
            CompressedStream?.Dispose();
            CompressedIndexedStream?.Dispose();
        }

        protected virtual void RewindEmpty(Stream stream)
        {
            stream.Position = 0;
        }

        protected virtual void Rewind(Stream stream)
        {
            stream.Position = 0;
        }

        protected virtual void RewindIndexed(Stream stream)
        {
            stream.Position = 0;
        }

        protected Stream CompressedEmptyStream { get; } = new MemoryStream(CompressedEmpty);

        protected static byte[] CompressedEmpty { get; } = new byte[] {
            0xfd, 0x37, 0x7a, 0x58, 0x5a, 0x00, 0x00, 0x01, 0x69, 0x22, 0xde, 0x36, 0x00, 0x00, 0x00, 0x00,
            0x1c, 0xdf, 0x44, 0x21, 0x90, 0x42, 0x99, 0x0d, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x59, 0x5a
        };

        protected static byte[] OriginalEmptyBytes => Encoding.ASCII.GetBytes(OriginalEmpty);

        protected static string OriginalEmpty { get; } = string.Empty;

        protected Stream CompressedStream { get; } = new MemoryStream(Compressed);

        protected static byte[] Compressed { get; } = new byte[] {
            0xfd, 0x37, 0x7a, 0x58, 0x5a, 0x00, 0x00, 0x04, 0xe6, 0xd6, 0xb4, 0x46, 0x02, 0x00, 0x21, 0x01,
            0x16, 0x00, 0x00, 0x00, 0x74, 0x2f, 0xe5, 0xa3, 0xe0, 0x01, 0xe4, 0x01, 0x3c, 0x5d, 0x00, 0x26,
            0x98, 0x4a, 0x47, 0xc6, 0x6a, 0x27, 0xd7, 0x36, 0x7a, 0x05, 0xb9, 0x4f, 0xd7, 0xde, 0x52, 0x4c,
            0xca, 0x26, 0x4f, 0x23, 0x60, 0x4d, 0xf3, 0x1f, 0xa3, 0x67, 0x49, 0x53, 0xd0, 0xf5, 0xc7, 0xa9,
            0x3e, 0xd6, 0xb5, 0x3d, 0x2b, 0x02, 0xbe, 0x83, 0x27, 0xe2, 0xa6, 0xc3, 0x13, 0x4a, 0x31, 0x14,
            0x33, 0xed, 0x9a, 0x85, 0x1d, 0x05, 0x6e, 0x7e, 0xa4, 0x91, 0xbf, 0x46, 0x71, 0x7d, 0xa7, 0xfb,
            0x12, 0x10, 0xdf, 0x21, 0x73, 0x75, 0xd8, 0xd9, 0xab, 0x8f, 0x1f, 0x8b, 0xb0, 0xb9, 0x3f, 0x9a,
            0xa5, 0x1e, 0xd4, 0x2f, 0xdf, 0x09, 0xb3, 0xfe, 0x45, 0xef, 0x16, 0xec, 0x95, 0x68, 0x64, 0xbb,
            0x42, 0x0c, 0x8b, 0x96, 0x27, 0x30, 0x62, 0x42, 0x91, 0x7c, 0xf3, 0x6e, 0x4d, 0x03, 0xc5, 0x00,
            0x04, 0x73, 0xdd, 0xee, 0xb0, 0xaa, 0xd6, 0x0b, 0x11, 0x90, 0x81, 0xd4, 0xaa, 0x69, 0x63, 0xfa,
            0x2f, 0xb4, 0x25, 0x0a, 0x7f, 0xf9, 0x47, 0x77, 0xb1, 0x1f, 0xc3, 0xb4, 0x4d, 0x51, 0xf8, 0x23,
            0x3a, 0x7c, 0x44, 0xc8, 0xcc, 0xca, 0x72, 0x09, 0xae, 0xc9, 0x7b, 0x7e, 0x91, 0x5d, 0xff, 0xc4,
            0xeb, 0xfd, 0xa1, 0x9b, 0xd4, 0x8d, 0xd7, 0xd3, 0x57, 0xac, 0x7e, 0x3b, 0x97, 0x2e, 0xe4, 0xc2,
            0x2e, 0x93, 0x3d, 0xb0, 0x16, 0x64, 0x78, 0x45, 0xb1, 0xc9, 0x40, 0x96, 0xcf, 0x5b, 0xc2, 0x2f,
            0xaa, 0xba, 0xcf, 0x98, 0x38, 0x21, 0x3d, 0x1a, 0x13, 0xe8, 0xa6, 0xa6, 0xdf, 0xf4, 0x3d, 0x01,
            0xa1, 0x9d, 0xc1, 0x3e, 0x37, 0xac, 0x20, 0xc4, 0xef, 0x18, 0xb1, 0xeb, 0x35, 0xf4, 0x66, 0x9a,
            0x47, 0x3c, 0xce, 0x7c, 0xad, 0xdb, 0x2e, 0x39, 0xf5, 0x8d, 0x4a, 0x1d, 0x65, 0xc2, 0x0f, 0xa4,
            0x40, 0x7e, 0xe6, 0xa7, 0x17, 0xce, 0x75, 0x7f, 0xd9, 0xa3, 0xf9, 0x27, 0x42, 0xd7, 0x98, 0x54,
            0x17, 0xa7, 0x7a, 0x7c, 0x82, 0xdf, 0xeb, 0x08, 0x28, 0x86, 0xdd, 0x57, 0x77, 0x92, 0x80, 0x5f,
            0x7b, 0x3b, 0xce, 0x77, 0x72, 0xff, 0xa3, 0x85, 0xd8, 0x5c, 0x8a, 0xb7, 0x83, 0x58, 0xfa, 0xbd,
            0x72, 0xe3, 0x66, 0x9d, 0x3b, 0xff, 0x13, 0x5b, 0x0b, 0xf1, 0x6c, 0xa6, 0xb1, 0x3b, 0x85, 0x3b,
            0x47, 0x91, 0xc8, 0x7c, 0x38, 0xe2, 0xe5, 0x54, 0xf8, 0x27, 0xee, 0x00, 0xff, 0xd3, 0x68, 0xf1,
            0xc6, 0xc7, 0xd7, 0x24, 0x00, 0x01, 0xd8, 0x02, 0xe5, 0x03, 0x00, 0x00, 0xac, 0x16, 0x1f, 0xa4,
            0xb1, 0xc4, 0x67, 0xfb, 0x02, 0x00, 0x00, 0x00, 0x00, 0x04, 0x59, 0x5a
        };
        protected static byte[] OriginalBytes => Encoding.ASCII.GetBytes(Original);

        protected static string Original { get; } =
            "Mary had a little lamb,\r\n" +
            "His fleece was white as snow,\r\n" +
            "And everywhere that Mary went,\r\n" +
            "The lamb was sure to go.\r\n" +
            "\r\n" +
            "He followed her to school one day,\r\n" +
            "Which was against the rule,\r\n" +
            "It made the children laugh and play\r\n" +
            "To see a lamb at school.\r\n" +
            "\r\n" +
            "And so the teacher turned it out,\r\n" +
            "But still it lingered near,\r\n" +
            "And waited patiently about,\r\n" +
            "Till Mary did appear.\r\n" +
            "\r\n" +
            "\"Why does the lamb love Mary so?\"\r\n" +
            "The eager children cry.\r\n" +
            "\"Why, Mary loves the lamb, you know.\"\r\n" +
            "The teacher did reply.";

        protected Stream CompressedIndexedStream { get; } = new MemoryStream(CompressedIndexed);

        protected static byte[] CompressedIndexed { get; } = new byte[] {
            0xfd, 0x37, 0x7a, 0x58, 0x5a, 0x00, 0x00, 0x01, 0x69, 0x22, 0xde, 0x36, 0x03, 0xc0, 0xe3, 0x02,
            0x80, 0x20, 0x21, 0x01, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xe5, 0xd7, 0x32, 0xe0, 0x0f, 0xff, 0x01,
            0x5b, 0x5d, 0x00, 0x26, 0x98, 0x4a, 0x47, 0xc6, 0x6a, 0x27, 0xd7, 0x36, 0x7a, 0x05, 0xb9, 0x4f,
            0xd7, 0xde, 0x3a, 0x0e, 0xee, 0x1b, 0xd7, 0x81, 0xe9, 0xf5, 0x90, 0x1e, 0xd5, 0x9e, 0x88, 0x32,
            0x1c, 0x7b, 0x43, 0x84, 0x02, 0x58, 0x92, 0xcf, 0x97, 0xfc, 0xae, 0x01, 0x83, 0x23, 0x48, 0x93,
            0xc6, 0x56, 0xcc, 0x6d, 0xb1, 0x23, 0x10, 0x24, 0x3b, 0x9e, 0x06, 0xaa, 0xc0, 0xce, 0x86, 0x0a,
            0xb7, 0x9f, 0x99, 0x61, 0xbe, 0x3b, 0x6d, 0xfe, 0x60, 0xef, 0x14, 0x35, 0x7f, 0x21, 0xe8, 0x96,
            0x0e, 0xbd, 0x41, 0x7c, 0x65, 0x89, 0x96, 0x28, 0x5e, 0x85, 0xa6, 0x4b, 0xf3, 0xf9, 0xf8, 0x25,
            0x31, 0x4a, 0xbb, 0x72, 0xce, 0xcf, 0x53, 0xdf, 0x13, 0x42, 0x2d, 0xbc, 0x95, 0xa5, 0x6d, 0xc4,
            0x8c, 0x72, 0x99, 0xe8, 0x9a, 0xcf, 0x80, 0xd4, 0xc4, 0x3f, 0x55, 0xc3, 0x9b, 0x00, 0xce, 0x65,
            0x27, 0x6e, 0xbf, 0xb2, 0x88, 0xab, 0xc0, 0x5f, 0xf9, 0xd0, 0xc8, 0xbb, 0xd7, 0x48, 0xd7, 0x2e,
            0x5e, 0xbb, 0x23, 0x35, 0x6e, 0x62, 0xb6, 0x13, 0xd4, 0x06, 0xd1, 0x5b, 0x97, 0xee, 0x5b, 0x89,
            0x78, 0x07, 0x24, 0x74, 0x59, 0x06, 0x1e, 0x7f, 0x8c, 0xb0, 0x48, 0xff, 0x0a, 0x76, 0xb2, 0x07,
            0xa0, 0x99, 0xf5, 0x4b, 0x68, 0xd4, 0x55, 0x32, 0xb3, 0x17, 0x7b, 0xb6, 0x26, 0xdb, 0x1c, 0xc3,
            0x0b, 0xda, 0x3e, 0x46, 0xba, 0x1a, 0x67, 0x23, 0xb7, 0x2a, 0x40, 0xdc, 0xc9, 0xa2, 0xe4, 0xb5,
            0x68, 0x5c, 0x81, 0x60, 0xa7, 0xad, 0xe6, 0xba, 0xbb, 0x0d, 0x82, 0x8a, 0xe2, 0x03, 0xa9, 0x22,
            0x09, 0x5e, 0xd8, 0x69, 0xfa, 0x29, 0xd1, 0x32, 0xa1, 0xf0, 0x9b, 0x3c, 0xc3, 0x0b, 0x9a, 0x53,
            0xf0, 0x3e, 0xf3, 0x1b, 0x77, 0xee, 0x8f, 0xa6, 0x15, 0x02, 0x77, 0x14, 0x54, 0x60, 0xae, 0xbe,
            0x91, 0x9e, 0xe6, 0x8b, 0x87, 0x6e, 0x46, 0x44, 0x64, 0xc7, 0x58, 0x90, 0x62, 0x25, 0x32, 0xf9,
            0xcd, 0xd2, 0x73, 0x2e, 0x3f, 0xd7, 0x5d, 0x3c, 0x86, 0x1c, 0xa8, 0x35, 0xa9, 0xc2, 0xcb, 0x59,
            0xcb, 0xac, 0xb3, 0x03, 0x12, 0xd4, 0x8a, 0xde, 0xd5, 0xc1, 0xd8, 0x0c, 0x32, 0x49, 0x87, 0x97,
            0x62, 0x4f, 0x32, 0x39, 0x63, 0x5b, 0x8b, 0xd1, 0x6c, 0x5c, 0x90, 0xd9, 0x93, 0x13, 0xae, 0x70,
            0xf5, 0x2f, 0x40, 0xaf, 0x01, 0x95, 0x01, 0x0c, 0xc5, 0xfa, 0x82, 0xf8, 0x71, 0x9d, 0x53, 0xe6,
            0x47, 0x6e, 0x99, 0x54, 0x57, 0x41, 0x72, 0xea, 0xf5, 0x78, 0xdd, 0x86, 0xbd, 0x00, 0x00, 0x00,
            0x72, 0x6a, 0xf2, 0x47, 0x03, 0xc0, 0xcb, 0x01, 0x8d, 0x02, 0x21, 0x01, 0x00, 0x00, 0x00, 0x00,
            0xfb, 0xa7, 0xf7, 0x94, 0xe0, 0x01, 0x0c, 0x00, 0xc3, 0x5d, 0x00, 0x06, 0x82, 0xca, 0x9b, 0x77,
            0x93, 0x57, 0xb3, 0x76, 0xbd, 0x8b, 0xcb, 0xee, 0xf4, 0x2c, 0xff, 0x7f, 0x95, 0x33, 0x15, 0x10,
            0xa5, 0xf9, 0xfd, 0xa6, 0xbb, 0x9e, 0xf9, 0x75, 0x67, 0xee, 0xec, 0x8b, 0x40, 0xea, 0x32, 0x47,
            0x3d, 0x26, 0xbe, 0x11, 0x9c, 0xa6, 0x40, 0xbe, 0x84, 0x1f, 0x1b, 0x35, 0x1a, 0x66, 0x10, 0x9c,
            0xf4, 0x12, 0x1a, 0x95, 0x81, 0xb5, 0x55, 0x6b, 0xc5, 0x42, 0xfd, 0x37, 0x70, 0xc5, 0x08, 0xa4,
            0x27, 0x67, 0x11, 0x0b, 0x1f, 0xcc, 0xdb, 0x54, 0x9b, 0x5a, 0x5f, 0xee, 0x21, 0x63, 0xdd, 0x4b,
            0xbc, 0x49, 0x95, 0x6d, 0xf4, 0xcb, 0x9a, 0x9a, 0x5e, 0xe4, 0x7d, 0x0f, 0x02, 0x22, 0xa9, 0x42,
            0x46, 0x1a, 0x04, 0x87, 0x43, 0x72, 0x59, 0xa4, 0xd6, 0xeb, 0x69, 0x36, 0xde, 0xea, 0x53, 0x8c,
            0x89, 0xd7, 0x22, 0xa6, 0xf7, 0xa8, 0x4c, 0x72, 0x6c, 0x80, 0x69, 0x01, 0xb2, 0xa7, 0xe8, 0x8b,
            0x94, 0xaf, 0x0e, 0x47, 0x58, 0x1d, 0x0e, 0x5c, 0x7c, 0x33, 0x9f, 0x21, 0x17, 0x2c, 0x4f, 0x3d,
            0x72, 0xff, 0xcf, 0x7a, 0x4f, 0x82, 0x5b, 0x85, 0x28, 0x70, 0xf4, 0x8c, 0x81, 0x41, 0xb8, 0x20,
            0x5c, 0x3e, 0x02, 0x5e, 0x5a, 0x61, 0xbb, 0x2f, 0x64, 0xc5, 0x4e, 0x53, 0xe4, 0xca, 0xe4, 0xd9,
            0x75, 0xaf, 0x15, 0x4d, 0xff, 0x01, 0xec, 0x13, 0x4a, 0x70, 0x00, 0x04, 0xf9, 0xfa, 0x00, 0x00,
            0x99, 0x57, 0xc4, 0x96, 0x00, 0x02, 0xf7, 0x02, 0x80, 0x20, 0xdf, 0x01, 0x8d, 0x02, 0x00, 0x00,
            0x4c, 0x41, 0xe6, 0xa1, 0x9b, 0xe3, 0x51, 0x40, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0x59, 0x5a
        };

        protected static byte[] OriginalIndexedBytes => Encoding.ASCII.GetBytes(OriginalIndexed);

        protected static string OriginalIndexed { get; } = Original + Original + Original + Original + Original + Original + Original + Original + Original;
    }
}
